AU616787B2 - Gas refuelling device for motor vehicles - Google Patents

Gas refuelling device for motor vehicles Download PDF

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Publication number
AU616787B2
AU616787B2 AU39563/89A AU3956389A AU616787B2 AU 616787 B2 AU616787 B2 AU 616787B2 AU 39563/89 A AU39563/89 A AU 39563/89A AU 3956389 A AU3956389 A AU 3956389A AU 616787 B2 AU616787 B2 AU 616787B2
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Australia
Prior art keywords
gas
refuelling
set forth
pressure
operation state
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Expired
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AU39563/89A
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AU3956389A (en
Inventor
Heinz Mutter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco Schweiz AG
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Sulzer AG
Gebrueder Sulzer AG
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Publication of AU3956389A publication Critical patent/AU3956389A/en
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Assigned to GREENFIELD AG reassignment GREENFIELD AG Alteration of Name(s) in Register under S187 Assignors: SULZER BROTHERS LIMITED
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/002—Automated filling apparatus
    • F17C5/007—Automated filling apparatus for individual gas tanks or containers, e.g. in vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0311—Closure means
    • F17C2205/0314—Closure means breakable, e.g. with burst discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0341—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0478—Position or presence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0689—Methods for controlling or regulating
    • F17C2250/0694—Methods for controlling or regulating with calculations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/065—Fluid distribution for refueling vehicle fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0139—Fuel stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1842—Ambient condition change responsive
    • Y10T137/1939—Atmospheric
    • Y10T137/1963—Temperature

Description

Form COMMCNINEALTH OF AUSTRALIA PATENTS ACT 1952-69 COMPL?.-=TE SPECIFICATION (ORIGINAL) 616787 Class I t. Class A.npIcation Number: Lodged: Complete Specification Lodged: Accepted: Published: *Prjqrity: Re ted Art: Name of Applicant: SULZER BROTHERS LIMITED dcfress of Applicant cl Ilnventor: Acje~s for Service CH-8401 Winterthur, Switzerland HEINZ MUTTER XAM~qXKMAMKR8W0 XWatermark- Patent Trademark Attorneys 50 QUjEEN STREET, MELBOURNE, AUS7 A.ALIA, 3000.
Complete Specification for the invention enlifled: GAS REFUELLING DEVICE FOR MOTOR VEHICLES The following statement is a full description of this invention, including the best method of performing it known to us I
A.
ii l1 Gebr~der SuIer. AkAiengie-lschaft. WinLe;:hurASizar1_and O,_raef!Aln___eIwJ_ e__formo to r yeh forc The invention relates to a gas refuelling device for motor vehicles, comprising a compress.or unit, a gas distributor unit, a control and an operating unit. Gas refuelling devices for motor- vehicles are currently being used on an experimental basis in areas where natural gas can be obtained at a low cost. The motor vehicles are provided with 9o a change-over unit for gas operation and with a pressure tank, which permits pressures of up to 200 bar, and filled o with compressed gas. Components for filling stations of this kind are contained in the following patent applications Sulzer patent application CH 02810/87-0 e n Sulzer patent application CIH 00582/88-0 9.J Sulzer patent application CH 02209/88-9 Sulzer patent application CH 04560/86-6 Honeywell-Lucifer patent application CH 00882/88-0 9999 oooo The components, such as compressors, valves, control 1 elemente and construction parts, of all the above-mentioned applications represent partial solutions for the manufacture of standard refuelling devices. They have not yet been combined in a concept which allows for the change in the thermodynamic properties of the gas as a function of the external conditions, nor do the safety measures taken with respect to the actual device cover use by untrained private 1 2persons.
An object of the invention is to develop a concept for combining manipulations and the control at a gas refuelling device which enables standard gas refuelling devices to be hirct. out to private households, without this entailing an unnecessary risk to lives and property and/or legally ambiguous situations between the owner and the hirer. This necessitates the provision of criteria in che gas refuelling device according to which incorrect manipulations and changing boundary conditions are automatically evaluated during the refuelling operation!, in order that the device can be automatically and continuously "maintained in an operating state which is adapted to the situation.
o 15 In accordance with one aspect, the present 00o invention provides a gas refuelling device capable of 4 operating in one of at least two operating states, said evice comprising a gas distribution means for conveying gas 20 therethrough to an outlet; a compressor unit for pumping the flow of gas in said gas distribution means; ;4o ~an operating unit for selectively activating said 4o, 04 device in one of said states; S 25 at least one temperature sensor for sensing the temperature of ambient air external to said device and generating an actual value signal in response thereto; at least one pressure sensor for sensing the pressure of the gas flow in said gas distribution means and generating an actual value signal in response thereto; a control unit connected to each sensor to receive a respective signal therefrom for comparison with a respective range of permissible values for said respective signal and to generate a control signal in response to a deviation of a respective actual value signal from a respective range of permissible values therefor; and i 2aswitching means connected to said control unit to receive said control signal to change said device from one operating state to another of said operating states.
In another aspect the present invention provides a method for refuelling a motor vehicle comprising the steps of delivering a flow of pressurized gas. to the vehicle from a refuelling device; sensing the temperature of ambient air external to the refuelling device; sensing the pressure of the gas flow; and o controlling the refuelling device in response to P Pthe sensed temperature and pressure to operate in one of PP four operating states including READY FOR OPERATION, NOT a 15 READY FOR OPERATION, IN OPERATION and SERVICE MODE whereby o~a* in response to said pressure deviating from a permissible a range of pressure, the device is switched into said NOT READY FOR OPERATION state.
S For example, the four operating states of in operation, ready for operation, not ready for operation and service mode are provided, these differing by the fact that the user always brings about the transition from the ready for operation state to the in operation state when giving a starting signal and the transition from the in operation state to the ready for operation state when giving a stop signal, while he only indirectly achieves the transition from the not ready for operation to the ready for operation 0 state by eliminating the faults indicated by the control.
o o .o The control automatically causes a change from the in o operation state to the ready for operation state when a 0000 maximum refuelling pressure, which is dependent on the outside temperature, is reached, while if boundary conditions are violated, e.g. a shutoff valve in the gas connection line is closed, the not ready for operation state S is triggered. All serious changes, such as a permissible set value range for pressure changes being exceeded and/or components of the device failing, result in the control causing a transition to the service mode operating state, and a return from this state to the ready for operation state can only be achieved by trained staff using auxiliary devices.
An advantage of the invention lies in the fact that consistent monitoring of the refuelling operation Is only made possible because set/actual value comparisons between pressures and temperatures are carried out at short time intervals, the permissible set values being corrected 00 00 O 0 0 0 0 4 0~0 0 0 0 0 00 00) 0 00 4 00 00 0 0 4 44'' 4 4 I 40 4 0 44 4 44 4 44 4 4 4 4 04 4004 4400 4 00004: according to the development of the preceding measuremen ts.
Very quick reactions are possible due to the short time interval and the process of monitoring -the changes of the gradient of a function. A further advantage lies in -the fact that, when the pressures are low, checks are carried out regarding the lack of a pressure increase at the beginning of the refuelling operation, for the purpose of detecting unconnected or defective fuel hoses and an automatic stoppage. In order to prevent servicing work on the compressor sub-assembly from being neglected, the refuelling devices are provided with operating hour meters, the counting memory of which is removed with the compressor as a part of the compressor knd can only be reset to zero with auxiliary devices. Control of Uhe devices is guaranteed by a preset limit 'to the operating hourcs per compressor and the device spontaneously closing down if this limit is exceeded, with alert signals being given arid the possibility of recalling the actual number of operating hours being provided. It has also proved advantageous to include the switching behaviour of elements of the gas distribution system, which are disposed outside the device, when evaluating the monitoring process upon starting up a refuelling device. In addition, the behaviour of the device is controlled such -that brief current interruptions only interrupt the refuelling operation, whereas a start signal has to be given after longer current interruptions. The invention thus enables a standard gas. refuelling device to be produced which is highly reliable, is provided with the necessary measuring and evaluation systems for compensating for the environmental effects on -the thermodynamic state variables and is suitable for use by private persons for refuelling motor vehicles.
The invention is explained in detail in the following on the basis of an embodiment and with reference to -the draw-ings.
Figure 1 is a diagrammatic view of a gas refuelling device according to the inv'ention, showing the essential components and their connections for carrying out a refuelling cycle.
00 Figure 2 is a diagrammatic view of four operating states of a gas refuelling device with -the possible transitions and o 0 the triggers responsible for -these.
Figure 3 is a graph for the maximum permissible refuelling pressure pniox as a function of the outside temperature T.
0Figure 4 is a graph Illustrating a rise in the refuelling pressure p as a functionr of the time t during -the refuelling 0:00. operation.
0000 00.000 Figure 5 is a graph in which possible set values for the pressure deviations of -the refuelling pressure at constant interrogation intervals are sho~in over the refuelling -time A gas refuelling device for motor vehicles is shown diagrammatically in the figures, with a refuelling hose 8 0 4 4 4 001 with a coupling 27, an indicator panel 21a with a sensor 22 for -the outside -temperature T and an operating panel 21b with a start and a stop button being mounted outside the housing 1, and the device being attached to an electrical connection lecad 4, to a gas connection Line 5 and 1 o a vent line 6, while the compressor 2 wi-th a sensor 23 for -the cooling air temperature and with a memory 25 for an operating hour meter, the electric motor 3 with a Senifor 24 for -the winding temperature and with a fan for -the cooling air, a gas in-take line 9 to the compressor 2, a gas pressure line 7 for refuelling, various electrical connection leads 26 and a control 11 with a control unit 20, with a bursting disk 15, with a sensor 16 for -the refuelling pressure p, with a reversing valve 14, with a differential pressure switch 17, with a pressure relief valve 18, with a bleeder throttle 13 and with a suction filter 12 are mounted Inside the housing 1.
According to the invention, the gas refuelling device comprises a -temperature sensor 22 and a pressure sensor 16 with connections -to a control unit 20, anid the control unit comprises set value memories for the range of permissibl~e values of the signals from the connec ted sensors and -the means for comparing the actual valuie signals with the set values. The control 11 comprises switching means and signal.
trans~mitters which, when actual values deviate from -their set value range, alter the operating state of the refuelling device. The following are given as operating states :not ready for operation 33, ready for operation 34,
J
in operation 35 and service mode 36, with -the change being triggered by set/actual value comparisons in the control 11 ,rwhile a change 29 from service mode 36 to ready for operation 34 can only be effected with auxiliary devices during servicing. The user triggers the change 31. from ready for operation 34 -to in operation 35 by means of a start button on an operating panel 21b and causes -the refuelling operation to stop prematurely by means of a stop button initiating the change 32 back to the ready for operation 3 f4 *~state 34, while he only indirectly triggers the change 28 from not ready for operation 33 to the ready for operation state 34 by eliminating the faults indicated by -the control.
44 In Figure 3 a set value correction for the given maximum 4 pressure pmax as a function of -the outside temperature T during the refuelling operation rises in a linear manner up 'to a -temperature T* and has a constant value, corresponding to -the pressure from at temperatures higher than T*.
A set value correction for the range of permissible pressure changes for the refuelling pressure p during the refuelling operation is shown in Figure 4 with a pressure rise during the -time from to to t2, which is shown by a broken line for constant boundary conditions beyond -the time to z, while the pressure deviations, which vary with the environmental conditions and -the refuelling -time, at a -time interval t2 ti are indicated In Figure 4 by a variable spread of the permissible curve course at the times -to, t2 and to z. Figure 5 shows a graph for a continuous 7 calculation of the set values for the deviations of the refuelling pressure during the refuelling operation, in which case, given a constant outside temperature and taking account of the initial refuelling pressure po of the value B and of a constant interrogation interval t2 ti, the permissible pressure deviations must lie within the hn tched area. Changes in the outside temperature at a time interval t2 ti shift the permissible set values for pressure deviations by a value C, which depends, inter alia, on the pressure pi at the time tl. This displacement is indicated 00 by the lines C' constant and C" constant.
o o 00 a, a, t a t 00 SQ 9t 8 e c c

Claims (17)

  1. 2. A gas refuelling device as set forth in claim 1 wherein said operating states include an IN OPERATION state and an OUT OF OPERATION state.
  2. 3. A gas refuelling device as set forth in claim 1 wherein said control unit has mineans for increasing said range of permissible values for said pressure signal in response to an increase in said actual temperature signal during a refuelling operation. (2r
  3. 4. A gds refuelling device as set forth in claim 3 wherein said latter means for increasing said range of permissible values increases said range of permissible values for said pressure signal up to a predetermined increase in said actual temperature signal and maintains said range constant in response to a further increase in said actual temperature signal. A gas refuelling device as set forth in claim 1 which further comprises an operatiing time meter connected Swith said compressor unit for recording the time of Soperation of said compressor unit.
  4. 6. A gas refuelling device as set forth in claim which further comprises signal means connected with said operating time meter to generate a warning signal before a selected time of operation is exceeded.
  5. 7. A gas refuelling device as set forth in claim 1 S wherein said control unit is a digital computer.
  6. 8. A gas refuelling device comprising a gas distribution means for dispensin F'ow of gas therefrom; a compressor unit for pumping the flow of gas in said gas distribution means; a control unit for operating said refuelling device in one of four operating states including READY FOR OPERATION, NOT READY FOR OPERATION, IN CERATION and SERVICE MODE; at least one temperature sensor; for sensing the temperature of ambient air external to said device and generating an actual value sig--al in response thereto; r| j t i p I at least one pressure sensor for sensing the pressure of the gas flow in said gas distribution means and generating an actual value signal in response thereto; and said control unit being connected to each sensor to receive a respective signal therefrom for comparison with a respective range of permissible values for said respective signal and to switch said refuelling device into said NOT READY FOR OPERATION state in response to a deviation of a said actual value signal from said range of permissible values therefor. A gas refuelling device as set forth in claim 8 0° wherein said control unit has means for increasing or 00: decreasing said range of permissible values for said pressure signal in response to a corresponding increase or decrease in said actual temperature signal during a refuelling operation. osis A gas refuelling device as set forth in claim 9 which further comprises an operating unit connected to said control unit and having a start buotton to switch said control unit from said READY FOR OPERATION state to said IN 0 OPERATION state and a stop button to switch said control 0 unit from said OPERATION state to said READY FOR OPERATION state.
  7. 11. A gas refuelling device as set forth in claim 9 which further comprises an operating time meter connected with said compressor unit for recording the time of operation of said compressor unit.
  8. 12. A gas refuelling device as set forth in claim 8 or 9 wherein sa.d gas distribution means includes a reservoir for receiving gas, an outlet line connecting said reservoir to said compressor unit to deliver gas thereto, a gas pressure line connected to said compressor unit to deliver gas therefrom and having said pressure sensor connected thereto, a hose connected to said gas pressure line to dispense gas therefrom in said IN OPERATION state and a reversing valve connected between said pressure line and said reservoir for .t recycling gas from said compressor unit to said reservoir. o, 13. A gas refuelling device as set forth in claim 1.2 Swherein said control unit is connected to said reversing valve to activate said valve to deliver gas to said reservoir in response to said control unit switching from said IN OPERATION state to said NOT READY FOR OPERATION state.
  9. 14. A gas refuelling device as set forth in claim 8 or 9 which further comprises an electrical connection line for delivering electrical energy to said compressor unit and a *switching means connected between said control unit and said electrical connection line to deactivate said compressor unit upon switching of said device into said SERVICE MODE. A gas refuelling device as set forth in claim 8 which further comprises an indicator panel ha/ing means for visually displaying an indication of each of said operating states.
  10. 16. A method for refuelling a motor vehicle comprising the steps of t delivering a flow of preusurized gas to the vehicle from a refuelling device; 7 ~Clrs} sensing the temperature of ambient air external to the refuelling device; se'.sing the pressure of the gas flow; and L.-ltrolling the refuelling device in response to the sensed temperature and pressure to operate in one of four operating states including READy FOR OPERATION, NOT READY FOR OPERATION, IN OPERATION and SERVICE MODE whereby in response to said pressure deviating from a permissible range of pressure, the device is switched into said NOT READY FOR OPERATION state. S17. A method as set forth in claim 16 wherein in response to an increasing or decreasing sensed temperature, said permissible range of pressure deviations is correspondingly increased or decreased as a function of refuelling time.
  11. 18. A method as set forth in claim 16 wherein the refuelling device is switchable from said NOT READY FOR OPERATION state to said READY FOR OPERATION state by a user and unswitchable from said SERVICE MODE to another state by the user.
  12. 19. A method as set forth in claim 16 wherein the maximum refuelling pressure is dependen, on the level of ambient temperature. A method as set forth in claim 16 wherein the X refuelling device switches from said IN OPERATION state to said NOT IN OPERATION state in response to its sensed pressure falling below a predetermined pressure within a predetermined time interval. .T '4 S21. A method as set forth in claim 16 which further comprises the steps of i determining a change in temperature of ambient air over a predetermined period of time adjusting said permissible range of pressure in response to a determined change in ambient air temperature; and switching the refuelling device into said NOT REI-.DY FOR OPERATION state in response to said sensed pressure falling outside said permissible range of pressure during a i predetermined start-up time for refuelling operation. ii 0 22. A method as set forth in claim 16 which further 0comprises the step of delaying said step of controlling the 0 refuelling device until after an initial start-up of the o refuelling device.
  13. 23. A method as set forth in claim 16 which further comprises the step of limiting operation of the refuelling device in time in accordance with a maximum fuel capacity of a fuel tank of a vehicle. 0 S24. A method as set forth in claim 16 which further comprises the steps of switching the refuelling device from said IN OPERATION state to said NOT READY FOR OPERATION state in response to a power failure during refuelling, switching the device from said NOT READY FOR OPERATION state to said IN OPERATION state after a preset brief time delay in restoring power and keeping the device in said NOT READY FOR OPERATION state when the power failure exceeds a second preset time delay. 1C 'Il A method as set forth in claim 16 which further comprises the step of switching the device into said SERVICE MODE in response to a failure to sense at least one of said temperature and said pressure.
  14. 26. A gas refuelling device capable of operating in one of at least two operating states, said device comprising a gas distribution means for conveying gas therethrough to an outlet; at least one pressure sensor for sensing the pressure of the gas flow in said gas distribution means and generating an actual value signal in response thereto; a control unit connected to said pressure sensor to receive an actual value signal therefrom for comparison with 4 4* J oa range of permissible values for said signal and to 4 generate a control signal in response to a deviation of an actual value signal from said range of permissible values therefor to change said control unit from one operating state to another of said operating states; S: at least one temperature sensor for sensing the temperature of ambient air external to said device and generating an actual value signal in response thereto; and means in said control unit connected to said temperature sensor to receive an actual value signal therefrom for increasing or decreasing said range of permissible values for said pressure signal in response to a corresponding increase or decrease in said actual temperature signal during a refuelling operation.
  15. 27. A gas refuelling device as set forth in claim 26 wherein said means for increasing or decreasing said range of permissible values increases or decreases said range of permissible values for said pressure signal to a predetermined increase or decrease in said actual temperature signal during a refuelling operation. Y I ir:
  16. 28. A gas refuelling device as set forth in claim 26 which further comprises a compressor unit for pumping the flow of gas in said gas distribution means and an operating time meter connected with said compressor unit for recording the time of operation of said compressor unit.
  17. 29. A gas refuelling device as set forth in claim 28 which further comprises signal means connected with said operating time meter to generate a warning signal before a selected time of operation is exceeded. K 30. A gas refuelling device as set forth in claim 26 o owherein said control unit is programmed for operating said refuelling device in one of four operating states including 0 READY FOR OPERATION, NOT READY FOR OPERATION, IN OPERATION o 0and SERVICE MODE, and which further comprises an operating unit connected to said control unit and having a start 4000,4 So button to switch said control unit from said READY FOR OPERATION state to said IN OPERATION state and a stop button Sto switch said control unit from said IN OPERATION state to said READY FOR OPERATION state. 00 0 o 31. A gas refuelling device substantially as 0: hereinbefore described with reference to the accompanying drawings. DATED this 30th day of July, 1991. SULZER BROTHERS LIMITED WATERMARK PATENT TRADEMARK ATTORNEYS, 290 Burwood Road, HAWTHORN. VIC. 3122 AUSTRALIA IAS:AGB:JZ (13.43) 7 i
AU39563/89A 1988-08-15 1989-08-14 Gas refuelling device for motor vehicles Expired AU616787B2 (en)

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Application Number Priority Date Filing Date Title
CH305888 1988-08-15
CH3058/88 1988-08-15

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US (1) US5029622A (en)
EP (1) EP0356377B1 (en)
AU (1) AU616787B2 (en)
CA (1) CA1333899C (en)
DE (1) DE58905754D1 (en)
NZ (1) NZ229839A (en)

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EP0356377A1 (en) 1990-02-28
AU3956389A (en) 1990-02-15
CA1333899C (en) 1995-01-10
US5029622A (en) 1991-07-09
NZ229839A (en) 1992-01-29
EP0356377B1 (en) 1993-09-29
DE58905754D1 (en) 1993-11-04

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